1 files changed, 8 insertions, 0 deletions
diff --git a/components/layout_thread/dom_wrapper.rs b/components/layout_thread/dom_wrapper.rs
index 3161de39b00..5cf29e8e159 100644
--- a/components/layout_thread/dom_wrapper.rs
+++ b/components/layout_thread/dom_wrapper.rs
@@ -74,6 +74,7 @@ use style::selector_parser::{AttrValue as SelectorAttrValue, NonTSPseudoClass, P
 use style::selector_parser::{PseudoElement, SelectorImpl, extended_filtering};
 use style::shared_lock::{SharedRwLock as StyleSharedRwLock, Locked as StyleLocked};
 use style::str::is_whitespace;
+use style::stylist::CascadeData;
 
 pub unsafe fn drop_style_and_layout_data(data: OpaqueStyleAndLayoutData) {
     let ptr = data.ptr.as_ptr() as *mut StyleData;
@@ -166,6 +167,13 @@ impl<'lr> TShadowRoot for ShadowRoot<'lr> {
     fn host(&self) -> ServoLayoutElement<'lr> {
         match self.0 { }
     }
+
+    fn style_data<'a>(&self) -> &'a CascadeData
+    where
+        Self: 'a,
+    {
+        match self.0 { }
+    }
 }
 
 impl<'ln> TNode for ServoLayoutNode<'ln> {